Arta weather in September
In September, Arta sees average daytime highs of 37°C and overnight lows near 27°C, with 13 mm of rain across 4.1 wet days and about 12.1 hours of daylight. It is the 4th-warmest and 8th-wettest month of the year here.
Highs ease over the month, from about 38°C in the first days to 36°C by the end. The sky is clear or mostly clear about 77% of the time in September, and the air most often feels muggy.
Daylight stretches from about 12 h 12 min at the start of September to 11 h 54 min by month's end. Set against the rest of the year, September is Arta's 4th-clearest and 12th-windiest month. For the whole year in context, see Arta's year-round climate.
- Daytime high
- 37°
- 4th warmest
- Overnight low
- 27°
- 9th coldest
- Rainfall
- 13 mm
- 4.1 wet days
- Daylight
- 12 h 06 min
- 6:01 AM – 6:05 PM
- Cloud cover
- 30%
- 4th clearest
- Wind
- 9 km/h
- 12th windiest
- Solar energy
- 6.14 kWh/m²
- Travel score
- 1.7
- out of 10
Arta is city in Djibouti.
- Density
- 8,738/km²
- people per km²
- Founded
- 1650
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Temperature in September
Highs ease over the month, from about 38°C in the first days to 36°C by the end.
A typical September day in Arta reaches about 37°C in the afternoon and slips back to 27°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 35°C and 39°C. Set against its neighbours, September runs on par with August and about 4°C warmer than October.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 38 | 38 | 38 | 38 | 38 | 38 | 38 | 38 | 38 | 38 | 38 | 38 | 38 | 38 | 38 | 38 | 37 | 37 | 37 | 37 | 37 | 37 | 37 | 36 | 36 | 36 | 36 | 36 | 35 | 35 |
| Avg low (°C) | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 25 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 38 | 28 |
| 2 | 38 | 28 |
| 3 | 38 | 28 |
| 4 | 38 | 28 |
| 5 | 38 | 28 |
| 6 | 38 | 28 |
| 7 | 38 | 28 |
| 8 | 38 | 28 |
| 9 | 38 | 28 |
| 10 | 38 | 28 |
| 11 | 38 | 28 |
| 12 | 38 | 28 |
| 13 | 38 | 28 |
| 14 | 38 | 28 |
| 15 | 38 | 27 |
| 16 | 38 | 27 |
| 17 | 37 | 27 |
| 18 | 37 | 27 |
| 19 | 37 | 27 |
| 20 | 37 | 27 |
| 21 | 37 | 27 |
| 22 | 37 | 27 |
| 23 | 37 | 26 |
| 24 | 36 | 26 |
| 25 | 36 | 26 |
| 26 | 36 | 26 |
| 27 | 36 | 26 |
| 28 | 36 | 26 |
| 29 | 35 | 26 |
| 30 | 35 | 25 |
How September really feels in Arta
Once humidity and wind are folded in, September averages 30 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.
The story in September is heat — humidity pushes the afternoon "feels like" well above the raw temperature.
Arta weather by month
How September compares with the rest of the year at a glance. September is the 4th-warmest and 8th-wettest month here — the current month is highlighted below.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 27° / 19° | 17 | 5.5 | 11.4 | 7.4 |
| Feb | 28° / 20° | 11 | 2.7 | 11.6 | 7.1 |
| Mar | 30° / 21° | 20 | 4.5 | 11.9 | 5.7 |
| Apr | 32° / 23° | 35 | 6.9 | 12.2 | 4.4 |
| May | 36° / 26° | 15 | 3.4 | 12.5 | 2.3 |
| Jun | 40° / 28° | 2 | 0.4 | 12.7 | 0.2 |
| Jul | 39° / 29° | 10 | 3.1 | 12.6 | 0.8 |
| Aug | 38° / 28° | 24 | 5.2 | 12.4 | 1.3 |
| Sep | 37° / 27° | 13 | 4.1 | 12.1 | 1.7 |
| Oct | 33° / 23° | 17 | 5 | 11.7 | 4.4 |
| Nov | 29° / 21° | 17 | 4.1 | 11.5 | 6.5 |
| Dec | 28° / 19° | 12 | 3.7 | 11.3 | 7.7 |
Cloud cover in September
The sky is clear or mostly clear about 77% of the time in September.
Beyond those clear spells, partly cloudy skies cover about 10% of September, with mostly cloudy or overcast conditions the remaining 12%. Skies tend to cloud over as the month goes on.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 90 | 90 | 90 | 90 | 89 | 89 | 89 | 89 | 89 | 89 | 89 | 89 | 88 | 88 | 88 | 88 | 88 | 88 | 88 | 87 | 87 | 87 | 87 | 87 | 86 | 85 | 85 | 85 | 85 | 84 |
| Cloudier (%) | 10 | 10 | 10 | 10 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 13 | 13 | 13 | 13 | 13 | 14 | 15 | 15 | 15 | 15 | 16 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 90 | 10 |
| 2 | 90 | 10 |
| 3 | 90 | 10 |
| 4 | 90 | 10 |
| 5 | 89 | 11 |
| 6 | 89 | 11 |
| 7 | 89 | 11 |
| 8 | 89 | 11 |
| 9 | 89 | 11 |
| 10 | 89 | 11 |
| 11 | 89 | 11 |
| 12 | 89 | 11 |
| 13 | 88 | 12 |
| 14 | 88 | 12 |
| 15 | 88 | 12 |
| 16 | 88 | 12 |
| 17 | 88 | 12 |
| 18 | 88 | 12 |
| 19 | 88 | 12 |
| 20 | 87 | 13 |
| 21 | 87 | 13 |
| 22 | 87 | 13 |
| 23 | 87 | 13 |
| 24 | 87 | 13 |
| 25 | 86 | 14 |
| 26 | 85 | 15 |
| 27 | 85 | 15 |
| 28 | 85 | 15 |
| 29 | 85 | 15 |
| 30 | 84 | 16 |
Chance of precipitation in September
Arta gets around 13 mm of rain over 4.1 wet days in September. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable rain averages around 14% and peaks near 15% on the wettest days.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain chance (%) | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 14 | 14 | 14 | 13 | 13 | 13 | 13 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 13 | 13 | 13 | 14 | 14 | 14 | 15 | 15 | 15 |
| Rain chance (%) | |
|---|---|
| 1 | 15 |
| 2 | 15 |
| 3 | 15 |
| 4 | 15 |
| 5 | 15 |
| 6 | 15 |
| 7 | 15 |
| 8 | 14 |
| 9 | 14 |
| 10 | 14 |
| 11 | 13 |
| 12 | 13 |
| 13 | 13 |
| 14 | 13 |
| 15 | 12 |
| 16 | 12 |
| 17 | 12 |
| 18 | 12 |
| 19 | 12 |
| 20 | 12 |
| 21 | 12 |
| 22 | 13 |
| 23 | 13 |
| 24 | 13 |
| 25 | 14 |
| 26 | 14 |
| 27 | 14 |
| 28 | 15 |
| 29 | 15 |
| 30 | 15 |
Humidity in September
Most of September feels muggy — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, September lands in the muggy band about 39% of days. Sticky, muggy-or-worse air turns up on roughly 62% of them.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dry (%) | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 1 |
| Comfortable (%) | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 10 | 10 | 9 | 9 | 8 | 7 | 7 | 6 | 5 | 4 | 4 | 3 | 3 | 2 | 2 | 2 | 2 | 2 | 2 | 3 | 3 | 4 |
| Humid (%) | 52 | 51 | 50 | 48 | 47 | 46 | 44 | 42 | 41 | 39 | 37 | 36 | 34 | 32 | 31 | 29 | 27 | 25 | 24 | 22 | 20 | 19 | 18 | 17 | 16 | 15 | 15 | 14 | 14 | 13 |
| Muggy (%) | 29 | 30 | 31 | 32 | 32 | 33 | 35 | 36 | 37 | 38 | 39 | 40 | 41 | 41 | 42 | 43 | 43 | 44 | 44 | 44 | 44 | 43 | 43 | 42 | 41 | 40 | 39 | 38 | 37 | 37 |
| Oppressive (%) | 7 | 7 | 7 | 8 | 8 | 9 | 10 | 10 | 11 | 12 | 13 | 14 | 16 | 17 | 19 | 21 | 23 | 25 | 27 | 29 | 32 | 34 | 36 | 38 | 40 | 41 | 42 | 43 | 44 | 45 |
| Miserable (%) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| Dry (%) | Comfortable (%) | Humid (%) | Muggy (%) | Oppressive (%) | Miserable (%) | |
|---|---|---|---|---|---|---|
| 1 | 1 | 11 | 52 | 29 | 7 | 0 |
| 2 | 1 | 11 | 51 | 30 | 7 | 0 |
| 3 | 1 | 11 | 50 | 31 | 7 | 0 |
| 4 | 1 | 11 | 48 | 32 | 8 | 0 |
| 5 | 1 | 11 | 47 | 32 | 8 | 0 |
| 6 | 1 | 11 | 46 | 33 | 9 | 0 |
| 7 | 1 | 11 | 44 | 35 | 10 | 0 |
| 8 | 1 | 11 | 42 | 36 | 10 | 0 |
| 9 | 1 | 10 | 41 | 37 | 11 | 0 |
| 10 | 1 | 10 | 39 | 38 | 12 | 0 |
| 11 | 1 | 9 | 37 | 39 | 13 | 0 |
| 12 | 1 | 9 | 36 | 40 | 14 | 1 |
| 13 | 1 | 8 | 34 | 41 | 16 | 1 |
| 14 | 1 | 7 | 32 | 41 | 17 | 1 |
| 15 | 1 | 7 | 31 | 42 | 19 | 1 |
| 16 | 1 | 6 | 29 | 43 | 21 | 1 |
| 17 | 1 | 5 | 27 | 43 | 23 | 1 |
| 18 | 1 | 4 | 25 | 44 | 25 | 1 |
| 19 | 1 | 4 | 24 | 44 | 27 | 1 |
| 20 | 1 | 3 | 22 | 44 | 29 | 1 |
| 21 | 1 | 3 | 20 | 44 | 32 | 1 |
| 22 | 1 | 2 | 19 | 43 | 34 | 1 |
| 23 | 0 | 2 | 18 | 43 | 36 | 1 |
| 24 | 0 | 2 | 17 | 42 | 38 | 1 |
| 25 | 0 | 2 | 16 | 41 | 40 | 1 |
| 26 | 0 | 2 | 15 | 40 | 41 | 1 |
| 27 | 0 | 2 | 15 | 39 | 42 | 1 |
| 28 | 1 | 3 | 14 | 38 | 43 | 1 |
| 29 | 1 | 3 | 14 | 37 | 44 | 1 |
| 30 | 1 | 4 | 13 | 37 | 45 | 1 |
Wind in September
Winds average 9 km/h in September, the calmest month.
Across September, daily wind ranges from about 8 km/h on the calmest days to 11 km/h at its breeziest. It stays fairly steady from day to day.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (km/h) | 11 | 10 | 10 | 10 | 10 | 10 | 9 | 9 | 9 | 9 | 9 | 9 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 9 | 9 | 9 | 9 |
| Feels | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm |
| Wind speed (km/h) | Feels | |
|---|---|---|
| 1 | 11 | calm |
| 2 | 10 | calm |
| 3 | 10 | calm |
| 4 | 10 | calm |
| 5 | 10 | calm |
| 6 | 10 | calm |
| 7 | 9 | calm |
| 8 | 9 | calm |
| 9 | 9 | calm |
| 10 | 9 | calm |
| 11 | 9 | calm |
| 12 | 9 | calm |
| 13 | 8 | calm |
| 14 | 8 | calm |
| 15 | 8 | calm |
| 16 | 8 | calm |
| 17 | 8 | calm |
| 18 | 8 | calm |
| 19 | 8 | calm |
| 20 | 8 | calm |
| 21 | 8 | calm |
| 22 | 8 | calm |
| 23 | 8 | calm |
| 24 | 8 | calm |
| 25 | 8 | calm |
| 26 | 8 | calm |
| 27 | 9 | calm |
| 28 | 9 | calm |
| 29 | 9 | calm |
| 30 | 9 | calm |
Sunrise & sunset in September
Daylight runs from about 12 h 12 min at the start of September to 11 h 54 min by month's end. The lit band spans sunrise to sunset each day.
Days shrink by about 18 minutes over September. Sunrise moves from 6:02 AM to 6:01 AM, and sunset from 6:15 PM to 5:55 PM.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 12.2 | 12.2 | 12.2 | 12.2 | 12.2 | 12.2 | 12.2 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 11.9 | 11.9 | 11.9 | 11.9 |
| Sunrise (AM) | 6:02 | 6:02 | 6:02 | 6:02 | 6:01 | 6:01 | 6:01 | 6:01 | 6:01 | 6:01 | 6:01 | 6:01 | 6:01 | 6:01 | 6:01 | 6:01 | 6:01 | 6:01 | 6:01 | 6:01 | 6:01 | 6:01 | 6:01 | 6:01 | 6:01 | 6:01 | 6:01 | 6:01 | 6:01 | 6:01 |
| Sunset (PM) | 6:15 | 6:14 | 6:14 | 6:13 | 6:12 | 6:12 | 6:11 | 6:10 | 6:10 | 6:09 | 6:08 | 6:08 | 6:07 | 6:06 | 6:06 | 6:05 | 6:04 | 6:03 | 6:03 | 6:02 | 6:01 | 6:01 | 6:00 | 5:59 | 5:59 | 5:58 | 5:57 | 5:57 | 5:56 | 5:55 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 12.2 | 6:02 | 6:15 |
| 2 | 12.2 | 6:02 | 6:14 |
| 3 | 12.2 | 6:02 | 6:14 |
| 4 | 12.2 | 6:02 | 6:13 |
| 5 | 12.2 | 6:01 | 6:12 |
| 6 | 12.2 | 6:01 | 6:12 |
| 7 | 12.2 | 6:01 | 6:11 |
| 8 | 12.1 | 6:01 | 6:10 |
| 9 | 12.1 | 6:01 | 6:10 |
| 10 | 12.1 | 6:01 | 6:09 |
| 11 | 12.1 | 6:01 | 6:08 |
| 12 | 12.1 | 6:01 | 6:08 |
| 13 | 12.1 | 6:01 | 6:07 |
| 14 | 12.1 | 6:01 | 6:06 |
| 15 | 12.1 | 6:01 | 6:06 |
| 16 | 12.1 | 6:01 | 6:05 |
| 17 | 12.1 | 6:01 | 6:04 |
| 18 | 12.0 | 6:01 | 6:03 |
| 19 | 12.0 | 6:01 | 6:03 |
| 20 | 12.0 | 6:01 | 6:02 |
| 21 | 12.0 | 6:01 | 6:01 |
| 22 | 12.0 | 6:01 | 6:01 |
| 23 | 12.0 | 6:01 | 6:00 |
| 24 | 12.0 | 6:01 | 5:59 |
| 25 | 12.0 | 6:01 | 5:59 |
| 26 | 12.0 | 6:01 | 5:58 |
| 27 | 11.9 | 6:01 | 5:57 |
| 28 | 11.9 | 6:01 | 5:57 |
| 29 | 11.9 | 6:01 | 5:56 |
| 30 | 11.9 | 6:01 | 5:55 |
Solar energy in September
Average shortwave solar energy reaching the ground each day in September, about 6.14 kWh/m².
For context, solar energy here swings from a low near 4.89 kWh/m² to a high of 6.54 kWh/m² in April across the year — September's 6.14 kWh/m² falls in the middle.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 6.3 | 6.3 | 6.3 | 6.3 | 6.3 | 6.2 | 6.2 | 6.2 | 6.2 | 6.2 | 6.2 | 6.2 | 6.2 | 6.2 | 6.1 | 6.1 | 6.1 | 6.1 | 6.1 | 6.1 | 6.1 | 6.1 | 6.1 | 6.1 | 6.1 | 6.1 | 6.1 | 6.1 | 6.1 | 6.1 |
| Level | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 6.3 | Intense |
| 2 | 6.3 | Intense |
| 3 | 6.3 | Intense |
| 4 | 6.3 | Intense |
| 5 | 6.3 | Intense |
| 6 | 6.2 | Intense |
| 7 | 6.2 | Intense |
| 8 | 6.2 | Intense |
| 9 | 6.2 | Intense |
| 10 | 6.2 | Intense |
| 11 | 6.2 | Intense |
| 12 | 6.2 | Intense |
| 13 | 6.2 | Intense |
| 14 | 6.2 | Intense |
| 15 | 6.1 | Intense |
| 16 | 6.1 | Intense |
| 17 | 6.1 | Intense |
| 18 | 6.1 | Intense |
| 19 | 6.1 | Intense |
| 20 | 6.1 | Intense |
| 21 | 6.1 | Intense |
| 22 | 6.1 | Intense |
| 23 | 6.1 | Intense |
| 24 | 6.1 | Intense |
| 25 | 6.1 | Intense |
| 26 | 6.1 | Intense |
| 27 | 6.1 | Intense |
| 28 | 6.1 | Intense |
| 29 | 6.1 | Intense |
| 30 | 6.1 | Intense |
Hazard calendar for Arta
In September, Arta sits inside its dust season. The full year is below, with each hazard's peak months called out.
Arta sees seasonal dust haze (June–September), heaviest in July.
Is September a good time to visit Arta?
Our two travel scores rate September for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
September is a weaker month for outdoor sightseeing in Arta.
What to pack for Arta in September
From September's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In September, Arta sees daytime highs around 37°C and nights near 27°C. Pack light clothes and sun protection. About 4 days see rain.
Sea temperature near Arta in September
The nearest coast averages about 31°C in September — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea offshore is warmest in June at about 31°C and coldest in February near 26°C.
The water stays above 20°C all year — warm enough for a swim any month.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 27 | 26 | 27 | 29 | 31 | 31 | 30 | 30 | 31 | 31 | 29 | 28 |
| Comfort | Warm | Warm | Warm | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Warm |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 27 | Warm |
| Feb | 26 | Warm |
| Mar | 27 | Warm |
| Apr | 29 | Tropical |
| May | 31 | Tropical |
| Jun | 31 | Tropical |
| Jul | 30 | Tropical |
| Aug | 30 | Tropical |
| Sep | 31 | Tropical |
| Oct | 31 | Tropical |
| Nov | 29 | Tropical |
| Dec | 28 | Warm |
UV index in Arta in September
Clear-sky midday UV in September peaks around 11 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Arta peaks around March 22 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 12 at about 9 (very high).
The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 11 | 12 | 14 | 14 | 12 | 11 | 9 | 11 | 11 | 11 | 9 | 8 |
| Level | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Very high | Extreme | Extreme | Extreme | Very high | Very high |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 11 | Extreme |
| Feb | 12 | Extreme |
| Mar | 14 | Extreme |
| Apr | 14 | Extreme |
| May | 12 | Extreme |
| Jun | 11 | Extreme |
| Jul | 9 | Very high |
| Aug | 11 | Extreme |
| Sep | 11 | Extreme |
| Oct | 11 | Extreme |
| Nov | 9 | Very high |
| Dec | 8 | Very high |
Air quality in Arta in September
Average fine-particle pollution (PM2.5) through the year — so you can see where September falls, not just the annual average.
Air quality in Arta is worst in July — around 42 µg/m³ PM2.5 (poor), about 2.1× the cleanest month (November, 20 µg/m³).
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 25 | 26 | 26 | 22 | 25 | 36 | 42 | 37 | 29 | 21 | 20 | 21 |
| Level | Moderate | Moderate | Moderate | Moderate | Moderate | Poor | Poor | Poor | Moderate | Moderate | Moderate | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 25 | Moderate |
| Feb | 26 | Moderate |
| Mar | 26 | Moderate |
| Apr | 22 | Moderate |
| May | 25 | Moderate |
| Jun | 36 | Poor |
| Jul | 42 | Poor |
| Aug | 37 | Poor |
| Sep | 29 | Moderate |
| Oct | 21 | Moderate |
| Nov | 20 | Moderate |
| Dec | 21 | Moderate |
Where is Arta?
Arta sits at 11.5°N, 42.9°E, 684 m above sea level, in Djibouti. The nearest listed city is Balbala, 28 km away.
Topography around Arta
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Arta.
Within 3 km, the terrain around Arta has significant variations in elevation — a maximum elevation change of 529 m around an average of 494 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 849 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,924 m.
The land around Arta is covered by bare terrain (92%) within 3 km, bare terrain (71%) and water (27%) within 16 km, and bare terrain (73%) and water (20%) within 80 km.
Djibouti travel facts
- Travel advisory
- Level 2
- Exercise Increased Caution
- Power plugs
- Type C / E
- 220 V · 50 Hz
- Prices
- ≈ 46% of US
- price level, 2025
- GDP per capita
- $3,906
- 2025
- Happiness
- 4.4 / 10
- World Happiness, 2014
- Road deaths
- 23.5
- per 100k/yr, 2019
- Income group
- Lower middle
- World Bank
- Religion
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Arta (11.5264°, 42.8519°, elevation 684 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).